PortfolioAutopsy: See how far your portfolio could fall before it does

Hi everyone, I'm Cooper. I study health science with a finance minor at USC. Most portfolio tools show you what you made. Very few show how bad a bad year could get for the mix you own today, so I built one that does. You paste the positions file from your broker. Schwab exports work as is, and most broker CSVs work too. The app runs today's weights through every market since 1999 and shows your deepest drawdown, how often you'd have lost money over one, three and five years, and how much adding cash or capping your biggest holding changes those numbers. The Crisis Replays tab runs the same check as of the market peaks before 2008, 2020 and 2022, so you can see whether the warning would have shown up in time. Everything computes in your browser. I never see your holdings. The math looks backward, so treat it as a risk gauge and not a forecast. I'd like to hear where it breaks and what you'd want it to show next.